Jeremy Corbyn and his team have done just that. We usually get given glimpses of the Labour leader from afar, and short videos of him talking to the camera, presumably when his press team have forced him to speak into it.

This was hastily withdrawn by his press team, headed by Seaumas Milne, who said: "I think that may have been slightly misinterpreted, what he said was that he would make no predictions about the number of seats to be won or lost in the local elections. We’re not in the business of losing seats and we’ll be fighting to win as many as possible tomorrow."